Adjustable safety steel tread



Patented' Feb. 15, 19227.

irm-tar v mci i EsHEL'MAN aAivT PATTON, or. nonnfsrown;rnnivsrnvnnin.

' ADJUSTABLE SAFETY s'rEEL 'TBEAn v Appilicafion'fiied January 12, 1926.Vserial na). 80,811. h

This invention relates to a combined'isafety tread and tire armor andaims to provide ar device of this character embodying a. pluralityof-plates, theplates being Connected by adjustable means constructed todraw the plates into close engagement with the tire on which they arepositioned.

Another important object of the invention is to provide tread platesforined with trans- 1o versely extended ribs for 'use on the rear' ordrive wheels of the motor vehicle toi increase traction. o

AV still further object of the invention is to provide plates havingconcaved tread portions defining Alateral ribs to bite into a snowy oricy surface and insure against lateral movement of the'wheels, tofacilitateI the steering of the vehicle.

With the foregoing and other objects in 2o view which will appear asthedescription 4 proceeds, the invention resides in the com'- binationand arrangement of parts and in the details of construction hereinafterdescribed i and claimed, it being unclerstood that changes in theVprecise'embodiment of the invention herein' disclosed, may be madewithin the scope of what is claimed,vwithout departing from the spiritof the invention.

Referring to the drawings: F igure 1 is a fragmental elevational viewillustrating a device constructed in accordance with the invention foruse on the drive wheels of a vehicle.

Figure 2 is a plan view of one of the tread plates. i

Figure 3 is a transverse sectional view through one of the tread plates.

. Figure 4 is a fragmental elevational view illustrating tread platesconstructedfor use on the front wheels of a vehicle.

Figure 5 is a plan view of one of the sections.

Figure 6 is a transverse sectional view through Vone of the plates usedon a front ..m Wheel. o

Figure 7 is a view illustrating thelockingI means for looking' theplates to a tire. Figure 8 is a view illustrating the adjustable'meansfor holding tread plates together. 'Referring to the drawings in detail,the device includes a plurality of Connected tread plates indicatedgenerally by the reference character 5, each of which includes arms 6,which arms have their side edges cut away throughout portions of theirlengths as at tion.V

7, to provide clearances between the: arms and permit of lmoveinent of.vone tread Vsec-` tion lwith respect to'its adjacent-tread sec-` Thesemembers 5 are' curved as clearly s shown by Figure 3 so that they Will'conform to the curvature of the tire on which they are positioned toinsure against'undue wear between the tread plates andtire. i

Openings are formed in the arms 6 at points' adjacent to theirouterends, which openingsaccomodate the hooks 8 that are formed withthreaded portions- 9 fitted in threaded openings of the link members 10,there being provided substantially S-shaped link members 11 connectedwith the link members 10 to hold the link members to gether.

From the foregoing` it will be obvious that these linkmembers 11 presentsubstantially fiat side surfaces which maybe engaged by a tool such aspliers or the like and rotated in 'such a way as to cause the arms Vvofadjacent tread plates to be drawnV towards each other them to the tire.p i

-In order'to 'increase traction of the wheels? in aV manner to secure onwhich the device is poSitiOned, ribs 12 are provided, which ribs areextended at oblique 'angles with respect to the inner edges of the treadplates and disposed in staggered relation with respectl to each other asshown by Figure 2.

. In the modified form of the invention as illustrated by Sheet 2 of thedrawings, the tread plates are indicated at 15 and are also providedwith arms indicated at 16 which arms are Connected by alinkfconstruction identical with'that shown by Figure 8 of the drawings.Inthis form of the invention, the tread portion ,of-each plate isconcaved as shown by Figure 6 defining spaced I'ibs 17 which aredesigned to bite into the snow or icy surface'over which'the \fehicle ismoving to insure the proper steering of the vehicle it being understoodthat the tread plates as shown by Sheet 2 are especially designed foruse on the front or guidingpwheels of the vehicle. s

In order that the device may be readily removed from awheel, adjustable.links'in- V dicated at 18 rare provided which have threaded openings toreceive the threaded portions of the hooks 19 that pass through certainopenings of adjacent plates. As-

sociated With the links 18 is'a clasp 20 that includesl a pivotedflarmr21v that may loeV and described 'Will provide a steel housing for thetire on Which they are positioned,

protecting the tire and' at the `'same time adding e'fficienoy to thevehiole by inereasing the tract-ion qualities of the drive wheels.

i -,7 I .ni 1@v A tirel armor including, a ,'plurality of treadsections, saidtreadisections having cut away'portions clefining arms,means Jfor conadapted to be hookeid onto 1thearms, 'said hook membershaving threaded extremities,V

link membershaving. threadelopenings to receive the threadedextremities, and a conneoting linlghahdapted to pass through the firs'tmentioned link members to secure the first. mentioned link memberstogether.

In testmony that I claimthe foregoing as my own, I have hereto afliXedmy signature.

